Body

Our emissions expert has put together the following information about the P0122 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.

OBD II Fault Code

OBD II P0122

Fault Code Definition
Code P0122 is triggered when the voltage output from the Throttle/Pedal Position Sensor/Switch to the PCM is too low.

The Throttle Position Sensor/Switch is located on the Throttle Body of the Intake Manifold and the Pedal Position Sensor/Switch is located on the Accelerator Pedal. These sensors provide precise input from the driver’s foot in terms of how much power is needed—and how urgently—from the engine.

As the Throttle Position Sensor is rotated from its base resting position to full acceleration, it sends a increasing voltage signal to the Powertrain Control Module (PCM). This decreasing or increasing voltage signal is used by the PCM to manage the Air Fuel Ratio and Spark Timing of the engine as well as other emissions system components.

Symptoms

Check Engine Light will illuminate
In many cases, no abnormal symptoms may be noticed
In some cases, the engine may be hard starting
In some cases, the engine may hesitate during acceleration
Common Problems That Trigger the P0122 Code

Defective Throttle Position Sensor or Switch
Torn or jammed floor mats
Faulty or corroded Throttle/Pedal Position Sensor/Switch wiring or connections
Common Misdiagnoses

Throttle or Pedal Position Sensor is replaced when the real problem is a poor connection or chafed wiring
Pedal Position Sensor is replaced when the real problem is torn or damaged floor mats

Possible Solutions

Some recommended troubleshooting and repair steps are:

Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it’s not rubbing on anything, grounding, etc. The code may come back.
Other TPS sensor and circuit related DTCs: P0120, P0121, P0123, P0124

How to reset oil life for Cadillac CT6 from years 2016, 2017 To turning off the Oil Life Light on 2016, 2017 Cadillac CT6, conform to the following instructions: Press SEL button on the steering wheel Scroll to Info Pages and press SEL button Hit the Up/Down button until you see the “OIL LIFE REMAINING” […]

How to reset oil life for Hyundai Veloster from years 2014, 2015, 2016, 2017 To turning off the Oil Life Light on 2014, 2015, 2016, 2017 Hyundai Veloster, conform to the following instructions: Turn the ignition to position On without starting the engine. Press and hold the TRIP button until you enter to “User Setting” […]

How to reset oil change warning light for Dacia Duster from years 2009, 2010, 2011, 2012, 2013, 2014, 2015 To turning off the Oil Life Light on 2009, 2010, 2011, 2012, 2013, 2014, 2015 Dacia Duster, conform to the following instructions: Turn the ignition key to position “ON” fully depress accelerator pedal and then depress […]

How do you reset maintenance light, reset service light indicator BMW X5 and BMW X6, year 2000-2013. For reset maintenance light and that can be made manually by use button on car dashboard. Reset oil service light, engine oil life BMW X5 and BMW X6, year 2000-2013 oil reset instructions: Turn the ignition to the […]

How do you reset maintenance light, reset service light BMW with 20 pin connector. For reset maintenance light and that can be made manually by use button on car dashboard. Reset service light, engine oil life BMW with 20 pin connector, oil reset instructions: How to reset oil maintenance light on BMW with 20 pin […]